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Recognised as Colour

#21BEA3

  • #21BEA3
  • Cyan
  • Dark
  • Nearest: Medium aquamarine

#21BEA3 is a cyan with RGB values 33, 190, 163 and HSL 170°, 70%, 44%. It is a dark colour, so black text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Medium aquamarine.

Colour values

#21BEA3#21BEA3
HEX#21BEA3
RGBrgb(33, 190, 163)
RGB (0–1)0.1294, 0.7451, 0.6392
RGB percentages12.9%, 74.5%, 63.9%
HSLhsl(169.7, 70.4%, 43.7%)
HSV / HSBhsv(169.7, 82.6%, 74.5%)
CMYK82.6%, 0%, 14.2%, 25.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,211,491
CSS custom property--colour: #21BEA3;

Brightness & contrast

Relative luminance0.39795WCAG 2.x, 0 is black and 1 is white
Perceived brightness156.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.96:1
Contrast with white2.34:1WCAG normal text: Fail
Contrast with black8.96:1WCAG normal text: AAA
Greyscale equivalent#9B9B9B
Inverted#DE415C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B6B2A2no red cones; affects about 1% of men; ΔE 43.8 from the original
Deuteranopia#A3A3A5no green cones; the most common form, about 1% of men; ΔE 45.3 from the original
Tritanopia#00C1B6no blue cones; rare, and affects men and women equally; ΔE 9.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.34:1WCAG large text: Fail
Contrast with black, large text8.96:1WCAG large text: AAA

Named colours

Medium aquamarine · ΔE 10.6Light seagreen · ΔE 12.1Turquoise · ΔE 13.7Medium turquoise · ΔE 15.3Dark turquoise · ΔE 17.9Medium seagreen · ΔE 22.2
Nearest named CSS colourMedium aquamarine (#66CDAA)ΔE 10.58, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BE213C
Analogous#21BE54, #218BBE
Triadic#A321BE, #BEA321
Split complementary#BE218B, #BE5421
Tetradic#5421BE, #BE213C, #8BBE21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B8F3E9
Lighter +30%#8DEBDB
Lighter +20%#61E4CD
Lighter +10%#36DCC0
Darker −10%#19937E
Darker −20%#126758
Darker −30%#0A3C33
Darker −40%#03100E
More saturated +25%#05DAB5
Less saturated −25%#3DA291

Channel breakdown

R33
G190
B163
Red33 (12.9%)
Green190 (74.5%)
Blue163 (63.9%)
Hue169.68°
Saturation (HSL)70.4%
Lightness43.73%
Dominant channelGreen
Hex per channelR 21 · G BE · B A3

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Every value on this page was computed from “21bea3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.